One, overview

Be struck by lightning is year answer one of serious and natural disaster of a year, as interior of equipment of our country microelectronics structural height is compositive change (VLSI chip) , cause equipment to be able to bear or endure thereby overvoltage, had been able to bear or endure voltaic level falls, to thunder (include overvoltage of inductive thunder and operation) of surge bear ability is reduced. Well-known, thunder has huge ruinous, its voltage is as high as millions bend over, instantaneous electric current can be as high as tens of 10 thousand. The ruinous consequence that place of be struck by lightning causes reflects at following 3 kinds of administrative levels: ① equipment breakdown, personal casualty; ② equipment or yuan life of parts of an apparatus is reduced; The signal that ③ is transmitted or stores, data (imitate or number) be disturbed or lose, make electronic equipment produces misoperation even and break down temporarily or whole system halt. Current, great majority of all sorts of buildings on the world, establishment still is using traditional lightning rod to prevent thunder. Using lightning rod to prevent direct be struck by lightning to carry out a proof is economy is mixed effective. But, as the ceaseless development of contemporary electron technology, of a large number of accurate electron equipment use and couplet net, lightning rod appears helpless however to the protection of these electronic equipment. Lightning rod cannot prevent overvoltage of inductive be struck by lightning, operation overvoltage and thunder electric wave to inbreak overvoltage, and this kind of overvoltage is the culprit that destroys many electron facility however. Annual all sorts of communication control a system or the network suffers destructive example common occurance because of be struck by lightning, how to because be caused equipment breakdown by be struck by lightning,defend supervisory system among them, the incident that automation monitoring is out of order often also has happen. Design of camera of front of the part in how preventing monitoring subsystem is means of the installation outdoor, area of much to thunderstorm hair must design installation to defend thunder system.

2, plan design explains

The system prevents thunder plan to include exterior prevent Lei He interior to prevent thunder two respects:

Exterior prevent thunder to include lightning rod, avoid thunder is taken, bring get offline, ground connection pole is waited a moment, its main function is to ensure building noumenon is avoided suffer what hit thunder continuously to invade, the thunder that hits the likelihood the building passes lightning rod, avoid thunder is taken, bring get offline etc, release enters the earth.

The internal system that prevent thunder is the equipment that is protective building interior and personnel is safe and of the setting. Install appropriate lightning arrester through the front of equipment is being protected in need, make equipment, circuitry and earth form conditional equipotential body. The lightning current block the way that enters the likelihood is outer, the lightning current that will make induction of in-house establishment place arrives because of be struck by lightning be able to safe release enters the ground, what facility receives after ensuring is safe.
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